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The Master's Mate Safety Initiative Network (MMSIn) — like AAA for the ocean, but free & community-driven. Cruisers keeping each other safe: anchor-drag & distress alerts, a verified captains directory, and a watch network that has your back.
High-speed Craft
GREY LADY IV
MMSI 367720690 · Call sign WDI6638
Not yet on Master's MateType
High-speed Craft
Flag
USALength
48 m
Beam
10 m
Draft
1.9 m
Call sign
WDI6638
Official No.
1267739
First reported
Jun 2026
Last reported
Jun 2026
AIS reports
86
GREY LADY IV is an American 48-metre passenger ferry. She has a beam of 10 m and a draft of 1.9 m. Look for MMSI 367720690, call sign WDI6638. Sign GREY LADY IV up free to the Master's Mate Safety Initiative Network and join a fleet that looks after its own.
Free forever · No credit card · for passenger & charter operators
Keep every soul aboard GREY LADY IV safe.
Distress alerting, live AIS, onboard monitoring and weather routing — the safety stack for boats that carry people.
Switch on the safety stack — free →Takes 60 seconds · Your data stays yours · Built by cruisers, for cruisers
Live AIS position · Jun 10, 2026 01:13 UTC
Position
41.2848° N, 70.0947° W
Status
Under way (engine)
Speed
0.0 kn
Course
230°
Destination
NANTUCKET ROUTE
ETA
10-31 08:19 UTC
Sailing off the U.S. East Coast? You're never out there alone.
Thousands of cruisers on the Master's Mate Network — ready to help the moment something goes wrong.
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Joining the Safety Initiative Network doesn't just put GREY LADY IV on the map. It hands you the full bridge:
Distress Mesh
Mayday & Pan-Pan that ripple out to nearby cruisers — a watch network that has your back.
Live AIS & Traffic
See every vessel around you in real time. Closest-approach warnings before they matter.
Systems Monitoring
Batteries, bilge, tanks, Victron & NMEA 2000 telemetry — your whole boat on one dashboard.
Weather & Routing
GRIB wind, swell & current on the chart. Plan passages with ETA-calibrated forecasts per leg.
Anchor Watch
GPS-precise drag alarms that actually wake you — and your whole crew. Sleep through the night.
Worldwide Charts
Navionics-grade vector charts, satellite & raster overlays, online or off. Your whole cruising ground.
Onboard Cameras
Watch your boat from anywhere — live feeds and 24h recording, straight from your gateway.
Hail Any Captain
A verified captains directory + direct hailing. Reach the boat next to you, or across the bay.
Claim GREY LADY IV and switch it all on
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About GREY LADY IV
What kind of vessel is GREY LADY IV?
GREY LADY IV is a High-speed Craft flagged to United States of America.
Where was GREY LADY IV last seen?
GREY LADY IV was last reported in off the U.S. East Coast in Jun 2026 on public AIS.
What is GREY LADY IV's MMSI?
GREY LADY IV's MMSI is 367720690. Call sign WDI6638.
How big is GREY LADY IV?
GREY LADY IV is about 48 m long, 10 m on the beam, drawing 1.9 m.
Is GREY LADY IV on the Master's Mate Safety Initiative Network?
Not yet. If GREY LADY IV is your boat, you can claim it free and join the Master's Mate Safety Initiative Network (MMSIn).
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